<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="sex">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="addFn(flag)">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in arr" :key="index">
          <td>{{ index + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.sex }}</td>
          <td>
            <button @click="delFn(index)">删除</button>
            <button @click="bjFn(item, index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      name: "",
      age: 0,
      sex: "",
      flag: false,
      arr: [
        {
          name: "张三",
          age: 18,
          sex: "男",
        },
        {
          name: "李四",
          age: 20,
          sex: "女",
        },
      ],
    };
  },
  methods: {
    addFn(index) {
      if (this.flag>=0) {
        this.arr[index].name = this.name;
        this.arr[index].sex = this.sex;
        this.arr[index].age = this.age;
      } else {
        if (
          this.name.trim().length === 0 ||
          this.age === 0 ||
          this.sex === ""
        ) {
          alert("不能为空");
          return;
        } else {
          this.arr.push({ name: this.name, age: this.age, sex: this.sex });
          (this.name = ""), (this.age = 0), (this.sex = "");
        }
      }
    },
    bjFn(item, index) {
      (this.name = item.name), (this.age = item.age), (this.sex = item.sex);
      this.flag = index;
    },
    delFn(index) {
      this.arr.splice(index, 1);
    },
  },
};
</script>
